CN103553490A - High-collapse-retentivity concrete, and preparation method and application thereof - Google Patents
High-collapse-retentivity concrete, and preparation method and application thereof Download PDFInfo
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- CN103553490A CN103553490A CN201310485169.6A CN201310485169A CN103553490A CN 103553490 A CN103553490 A CN 103553490A CN 201310485169 A CN201310485169 A CN 201310485169A CN 103553490 A CN103553490 A CN 103553490A
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- concrete
- slump retaining
- water
- silica
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- 239000004567 concrete Substances 0.000 title claims abstract description 50
- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 59
- 239000000843 powder Substances 0.000 claims abstract description 37
- 239000000741 silica gel Substances 0.000 claims abstract description 36
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 36
- 229960001866 silicon dioxide Drugs 0.000 claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 27
- 239000010881 fly ash Substances 0.000 claims abstract description 25
- 239000004568 cement Substances 0.000 claims abstract description 23
- 239000004576 sand Substances 0.000 claims abstract description 23
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims description 24
- -1 680~1030 parts Substances 0.000 claims description 22
- 239000004575 stone Substances 0.000 claims description 17
- 238000003756 stirring Methods 0.000 claims description 11
- 229920005646 polycarboxylate Polymers 0.000 claims description 6
- 239000011398 Portland cement Substances 0.000 claims description 5
- 239000008187 granular material Substances 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000002253 acid Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000010356 tongguan Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 1
- 230000003487 anti-permeability effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
Images
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention provides a high-collapse-retentivity concrete which is prepared from the following raw materials in parts by weight: 150-500 parts of cement, 70-100 parts of ore powder, 50-80 parts of fly ash, 680-1030 parts of sand, 840-1020 parts of gravel, 12-25 parts of silica-gel powder, 6-18 parts of water reducer and 150-175 parts of water. The high-collapse-retentivity concrete has excellent collapse retentivity, and can ensure the work under the conditions of high temperature and long haul distance. The invention also provides a preparation method of the high-collapse-retentivity concrete.
Description
Technical field
The present invention relates to building material field, be specifically related to a kind of high slump retaining concrete.
Background technology
Polycarboxylic acid series additive is compared with traditional admixture, owing to having excellent dispersing property, good slump hold facility, has become global study hotspot and development priority.Although the water-reducing property of polycarboxylic admixture excellence and good slump hold facility are extensively approved by industry, but due to cement minerals composition, cement fineness, gypsum form and volume, admixture addition, proportioning, water consumption and concrete mixing technique are all had to high susceptibility, had a strong impact on the widespread use of polycarboxylic acid series additive in engineering.Particularly China's cement type is various, and aggregate quality regional disparity is very large, often causes fresh concrete slump-loss larger, the impact of the factor such as hot weather, haul distance be far away in addition, and concrete slump loss is even more serious, is difficult to guarantee concrete quality.
Therefore, a kind of high slump retaining concrete of necessary invention solves the problems referred to above.
Summary of the invention
The object of the present invention is to provide a kind of concrete of high slump retaining, its function of slump protection is superior, can in the situation that far away, guarantee workability in high temperature, haul distance.
Another object of the present invention is to the concrete preparation method of high slump retaining who provides described.
Above-mentioned purpose of the present invention is achieved through the following technical solutions:
A kind of high slump retaining concrete is provided, and by weight, it is prepared from by following raw material:
150～500 parts of cement, 70～100 parts of breezes, 50～80 parts, flyash, 680～1030 parts, sand, 840～1020 parts, stone, 12～25 parts of silica-gel powders, 6～18 parts of water reducers, 150～175 parts, water.
In preferred embodiments of the present invention, described high slump retaining concrete, by weight, is prepared from by following raw material:
Label C60: 380～470 parts of cement, 70～100 parts of breezes, 50～80 parts, flyash, 680～800 parts, sand, 900～1020 parts, stone, 18～25 parts of silica-gel powders, 14～18 parts of water reducers, 150～160 parts, water.
In the preferred scheme of the present invention, described high slump retaining concrete, by weight, is prepared from by following raw material:
Label C60: 410～450 parts of cement, 90～100 parts of breezes, 60～70 parts, flyash, 680～720 parts, sand, 920～980 parts, stone, 23～25 parts of silica-gel powders, 16～18 parts of water reducers, 150～155 parts, water.
In the most preferred scheme of the present invention, described high slump retaining concrete, by weight, is prepared from by following raw material:
Label C60: 430 parts of cement, 100 parts of breezes, 70 parts, flyash, 690 parts, sand, 950 parts, stone, 25 parts of silica-gel powders, 18 parts of water reducers, 150 parts, water.
The preferred specific surface area of described silica-gel powder is 500～800m
2the levigate silica-gel powder of/kg.
Described 42.5 grades of ordinary Portland cements of cement preference.
Described breeze preferred S95 level breeze or more high-quality breeze.
Described flyash preferred II level flyash or more high-quality flyash.
Described sand is preferably medium sand, silt content≤2.0%, clod content≤0.5%.
Described stone is preferably rubble, particle diameter 5～20mm, silt content≤0.5%, clod content≤0.2%, faller gill shape granule content≤8%.
Described water reducer is preferably efficient polycarboxylate water-reducer.
The present invention also provides the described concrete preparation method of high slump retaining, comprises the following steps:
1) silica-gel powder and water reducer are mixed in described ratio, stir and to be no less than 5min, until mix full and uniformly, obtain mixture A stand-by;
2) cement, breeze, flyash, sand and stone are mixed in described ratio, stir and be no less than 30s, until mix full and uniformly, obtain mixture B stand-by;
3) mixture A step 1) being obtained and the water of described ratio add step 2) the mixture B that obtains, stir and be no less than 3min, until mix full and uniformly, obtain described high slump retaining concrete.
The preferred specific surface area of silica-gel powder described in step 1) is 500～800m
2the levigate silica-gel powder of/kg, can be first levigate to described specific surface area by silica-gel powder before mixing with water reducer.
Water reducer described in step 1) is preferably efficient polycarboxylate water-reducer.
Step 2) described 42.5 grades of ordinary Portland cements of cement preference; Described breeze preferred S95 level breeze or more high-quality breeze; Described flyash preferred II level flyash or more high-quality flyash; Described sand is preferably medium sand, silt content≤2.0%, clod content≤0.5%; Described stone is preferably rubble, particle diameter 5～20mm, silt content≤0.5%, clod content≤0.2%, faller gill shape granule content≤8%.
High slump retaining preparation method of concrete of the present invention is the adsorption that utilizes silica-gel powder, stirs in advance with polycarboxylate water-reducer, makes its water reducer have slow-release function, thereby solves the serious problem of concrete slump loss.Meanwhile, due to physics filling effect and the alkali reaction of levigate silica-gel powder, also make concrete cohesiveness and water-retentivity improve, impermeability significantly improves.
Compared with prior art, the present invention has following beneficial effect:
1, the invention solves adaptability poly carboxylic acid series water reducer and the former material of concrete responsive, very fast this disadvantage of slump-loss, makes concrete slump retaining superior performance, thereby in the situation that high temperature, haul distance are far away, guarantees concrete workability.Meanwhile, levigate silica-gel powder can improve concrete cohesiveness and water-retentivity, makes fresh concrete workability even more ideal, thereby meets the technical requirements of Current Engineering Construction.
2, silica-gel powder low price, originates numerous, and pretreatment technology is simple, convenient, and the concrete work performance obtaining by its technique is superior, and anti-permeability performance significantly improves, good mechanical properties, and cost performance is high.
Accompanying drawing explanation
Fig. 1 is the concrete process flow sheet of the high slump retaining of embodiment 1.
Embodiment
Embodiment 1:
The high slump retaining concrete of C30
A, production formula: cement 220kg/m
3, breeze 90kg/m
3, flyash 60kg/m
3, sand 940kg/m
3, stone 865kg/m
3, silica-gel powder 18.5kg/m
3, water reducer 9.6kg/m
3, water 165kg/m
3.
B, production technique: as shown in Figure 1, first, by the levigate extremely required specific surface area of silica-gel powder, by formula rate, weigh, by silica-gel powder and the artificial mix and blend 5min of water reducer, stir complete stand-by.Then by cement, breeze, flyash, sand, stone mix and blend 30s in stirrer.Finally the silica-gel powder stirring and water are added to stirrer mix and blend 3min, obtain high slump retaining concrete.
C, silica-gel powder: the triumphant Kiselgel A of Qingdao nation, levigate to specific surface area 600m
2/ kg.
D, water-cement ratio: 0.45.
E, cement: 42.5 grades, coloured glaze river ordinary Portland cement.
F, breeze: the two imperial S95 level breezes in Tangshan.
G, flyash: sincere Xingtai II level flyash.
H, sand: Shoudu Iron and Steel Co medium sand, silt content 1.5%, clod content 0.5%.
I, stone: Shoudu Iron and Steel Co rubble, silt content 0.3%, clod content 0.1%, faller gill shape granule content 7.7%
J, water reducer: the efficient polycarboxylate water-reducer of Zhong Tongguan boundary company limited.
K, performance: go out the machine slump/divergence 230/600, after 30min, the slump/divergence 220/570, and after 60min, the slump/divergence 215/520,28d average intensity 41.6Mpa.
L, impervious contrast:
Method according to the present embodiment is prepared concrete, and difference is only not add silica-gel powder, and the concrete impermeability comparing result of the concrete obtaining thus and the present embodiment is as shown in table 1 below:
Table 1
| Group | Maximum antiosmotic pressure (MPa) |
| Do not add silica-gel powder | 0.9 |
| Add silica-gel powder | 1.5 |
Embodiment 2:
The high slump retaining concrete of C60
A, production formula: cement 430kg/m
3, breeze 100kg/m
3, flyash 70kg/m
3, sand 690kg/m
3, stone 950kg/m
3, silica-gel powder 25kg/m
3, water reducer 18.0kg/m
3, water 150kg/m
3.
B, production technique: first, by the levigate extremely required specific surface area of silica-gel powder, by formula rate, weigh, by silica-gel powder and the artificial mix and blend 5min of water reducer, stir complete stand-by.Then by cement, breeze, sand, stone mix and blend 40s in stirrer.Finally the silica-gel powder stirring and water are added to stirrer mix and blend 4min, obtain high slump retaining concrete.
C, silica-gel powder: the triumphant Kiselgel A of Qingdao nation, levigate to specific surface area 800m
2/ kg.
D, water-cement ratio: 0.25.
E, cement: 42.5 grades, coloured glaze river ordinary Portland cement.
F, breeze: the two imperial S95 level breezes in Tangshan.
G, flyash: sincere Xingtai I level flyash.
H, sand: Shoudu Iron and Steel Co medium sand, silt content 1.0%, clod content 0.1%.
I, stone: Shoudu Iron and Steel Co rubble, silt content 0.3%, clod content 0.1%, faller gill shape granule content 7.7%
J, water reducer: the efficient polycarboxylate water-reducer of Zhong Tongguan boundary company limited.
K, performance: go out the machine slump/divergence 220/570, after 30min, the slump/divergence 210/550, and after 60min, the slump/divergence 210/500,28d average intensity 70.9Mpa.
L, impervious contrast:
Method according to the present embodiment is prepared concrete, and difference is only not add silica-gel powder, and the concrete impermeability comparing result of the concrete obtaining thus and the present embodiment is as shown in table 2 below:
Table 2
| Group | Maximum antiosmotic pressure (MPa) |
| Do not add silica-gel powder | 1.4 |
| Add silica-gel powder | 1.6 |
Claims (10)
1. a high slump retaining concrete, is characterized in that, by weight, it is prepared from by following raw material:
150～500 parts of cement, 70～100 parts of breezes, 50～80 parts, flyash, 680～1030 parts, sand, 840～1020 parts, stone, 12～25 parts of silica-gel powders, 6～18 parts of water reducers, 150～175 parts, water.
2. high slump retaining concrete claimed in claim 1, is characterized in that, by weight, it is prepared from by following raw material:
Label C60: 430 parts of cement, 100 parts of breezes, 70 parts, flyash, 690 parts, sand, 950 parts, stone, 25 parts of silica-gel powders, 18 parts of water reducers, 150 parts, water.
3. the high slump retaining concrete of any one described in claim 1 or 2, is characterized in that: described silica-gel powder is that specific surface area is 500～800m
2the levigate silica-gel powder of/kg.
4. the high slump retaining concrete of any one described in claim 1 or 2, is characterized in that: described cement is 42.5 grades of ordinary Portland cements.
5. the high slump retaining concrete of any one described in claim 1 or 2, is characterized in that: described breeze is S95 level breeze or more high-quality breeze.
6. the high slump retaining concrete of any one described in claim 1 or 2, is characterized in that: described flyash is II level flyash or more high-quality flyash.
7. the high slump retaining concrete of any one described in claim 1 or 2, is characterized in that: described sand is medium sand silt content≤2.0%, clod content≤0.5%.
8. the high slump retaining concrete of any one described in claim 1 or 2, is characterized in that: described stone is rubble, particle diameter 5～20mm, silt content≤0.5%, clod content≤0.2%, faller gill shape granule content≤8%.
9. the high slump retaining concrete of any one described in claim 1 or 2, is characterized in that: described water reducer is efficient polycarboxylate water-reducer.
10. the concrete preparation method of high slump retaining claimed in claim 1, comprises the following steps:
1) silica-gel powder and water reducer are mixed in described ratio, stir and be no less than 5min, until mixing of materials is full and uniform, obtain mixture A stand-by;
2) cement, breeze, flyash, sand and stone are mixed in described ratio, stir and be no less than 30s, until mixing of materials is full and uniform, obtain mixture B stand-by;
3) mixture A step 1) being obtained and the water of described ratio add step 2) the mixture B that obtains, stir and be no less than 3min, until mixing of materials is full and uniform, obtain described high slump retaining concrete.
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| Application Number | Priority Date | Filing Date | Title |
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|---|---|---|---|
| CN201310485169.6A CN103553490B (en) | 2013-10-16 | 2013-10-16 | A kind of high-collapse-retentivity concrete and its preparation method and application |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103922680A (en) * | 2014-03-22 | 2014-07-16 | 中国二十二冶集团有限公司 | Method for preparing green high-performance concrete by large doping amount mineral admixture |
| CN108249862A (en) * | 2018-02-07 | 2018-07-06 | 河南城建学院 | High-hardness building material and preparation method thereof |
| CN108698946A (en) * | 2016-02-19 | 2018-10-23 | 瓦克化学股份公司 | Improve the stabilizer of the storage stability of the construction material drying preparation comprising polymer powder |
| CN109574529A (en) * | 2018-12-06 | 2019-04-05 | 上海建工集团股份有限公司 | A kind of functional form recycled aggregate and preparation method and application reducing regeneration concrete workability gradual loss |
| CN113307579A (en) * | 2021-06-25 | 2021-08-27 | 天津金隅混凝土有限公司 | Machine-made sand low-shrinkage high-slump-retaining concrete |
| CN115403311A (en) * | 2022-08-31 | 2022-11-29 | 三亚瑞泽双林混凝土有限公司 | High slump loss resistant concrete and preparation method thereof |
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| CN1436158A (en) * | 2000-05-19 | 2003-08-13 | 阿克佐诺贝尔公司 | Composition and method for preparing concrete composition |
| CN103011637A (en) * | 2013-01-05 | 2013-04-03 | 中交四航工程研究院有限公司 | Bare concrete binding material and corrosion-resistant bare concrete utilizing same |
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2013
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| CA2262855A1 (en) * | 1997-05-15 | 1998-11-19 | Mbt Holding Ag | A cementitious mixture containing high pozzolan cement replacement and compatibilizing admixtures therefor |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103922680A (en) * | 2014-03-22 | 2014-07-16 | 中国二十二冶集团有限公司 | Method for preparing green high-performance concrete by large doping amount mineral admixture |
| CN108698946A (en) * | 2016-02-19 | 2018-10-23 | 瓦克化学股份公司 | Improve the stabilizer of the storage stability of the construction material drying preparation comprising polymer powder |
| CN108698946B (en) * | 2016-02-19 | 2022-04-12 | 瓦克化学股份公司 | Stabilizer for improving the storage stability of dry formulations of building materials containing polymer powders |
| CN108249862A (en) * | 2018-02-07 | 2018-07-06 | 河南城建学院 | High-hardness building material and preparation method thereof |
| CN108249862B (en) * | 2018-02-07 | 2020-09-15 | 河南城建学院 | High-hardness building material and preparation method thereof |
| CN109574529A (en) * | 2018-12-06 | 2019-04-05 | 上海建工集团股份有限公司 | A kind of functional form recycled aggregate and preparation method and application reducing regeneration concrete workability gradual loss |
| CN113307579A (en) * | 2021-06-25 | 2021-08-27 | 天津金隅混凝土有限公司 | Machine-made sand low-shrinkage high-slump-retaining concrete |
| CN113307579B (en) * | 2021-06-25 | 2022-08-05 | 天津金隅混凝土有限公司 | Machine-made sand low-shrinkage high-slump-retaining concrete |
| CN115403311A (en) * | 2022-08-31 | 2022-11-29 | 三亚瑞泽双林混凝土有限公司 | High slump loss resistant concrete and preparation method thereof |
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